Self-locking handle.



S. G. DOWN.

SELF LOOKING HANDLE.

APPLICATION FILED 001230, 1908.

LW9UM Patented Feb. 23, 19115.

WITNESSES IMVENTOR THE NORRIS PETERS CO4. PHOTO-LITHQ, WASHING roN. D4 Cv inseam.

tinrrnn e'rn rne PATENT UFFIQE,

SIDNEY GEORGE DOWN, OF GI-IICAGO, ILLINOIS, ASSIG-NOR TO THE WESTINGHOUSE AIR BRAKE COMPANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

SELF LOCKIN G HANDLE.

Specification of Letters Patent.

PatentedI eb. 23, 11915.

Application filed October 30, 1908. Serial Ito. 460,310.

To all whom it may concern:

Be it known that I, SIDNEY G. DOWN, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented new and useful Improvements in Self-Locking Handles, of which the following is a specification.

This invention relates to self locking handles, and is particularly designed for use in connection with stop cocks or angle cocks for train pipes on railway cars, for the purpose of preventing the accidental movement of the cock from one position to another.

The principal object of my invention is to provide an improved construction of the above character which is simple in design and which is adapted to protect the cock key from such application of pressure thereto as would tend to unseat the same and having means for preventing dirt from getting in around the key and working into the valve seat, which is apt to cause leakage.

I11 the accompanying drawing, Figure 1 is a side elevation of an ordinary train pipe angle cock, with a preferred form of my improvements applied thereto and F 1g. 2 a top plan view of same.

As shown in the drawing, the angle cock casing l is of the usual construction and is provided with an operating handle 2, secured to the valve key 3 and having the usual downwardly extending stop lug 4 adapted to engage respectively the fixed lugs 5 and 6 on the cock casing in the open and closed positions of the cock. D

According to my improvements, I provide a locking handle 7, adapted to be fulcrumed in any suitable manner on the cock handle 2, as by providing lugs 8 thereon, between which the locking handle is mounted on a fulcrum pin 9. The locking handle may be symmetrical with the cock handle and extend up over the top of the key 3. A downwardly extending lug 10 is provided on the upper portion of the locking handle in such position as to engage the stop lug 6 when the cock handle is in the open position, as clearly shown in the drawing. It will now be seen that the cock handle can not be moved in the direction to open the angle cock, so long as the lug 10 is in engagement with the lug 6. If it is desired to turn the cock to the closed position, however, the handles 2 and 7 are grasped and thereby the end of the locking handle 7 is rocked on its fulcrum, and the upper section thereof with lug 10 is raised so as to clear the lug 6 and thus permit the cock handleto be turned to the closed position. If desired, a similar locking lug 11 may be provided on handle 7 opposite to the lug 10, so that when the handles are released with the cock in its closed position, the lug 11 will drop down and engage the lug 5 and so hold the parts locked in the closed position also. I further provide the locking handle 7 with a downwardly extending flange portion 12 surrounding the key 3 and the adjacent portion of the cock handle and this flange is adapted to bear on the cock casing 1, leaving a sulficient clearance between the cock handle and the locking handle, so that pressure exerted from above, for instance, such as would be occasioned by a person standing or stepping thereon, is not transmitted to the key. By constructing the upper portion of the locking handle in the form of a cap, dust and dirt is excluded from the key.

Though particularly adapted for railway service, my improved self locking handle may be employed in connection with other forms of cocks and valves, as will be apparent.

Having now described my invention, What I claim as new and desire to secure my Let y ters Patent, is

1. A stop cock device comprising a plug cook or valve, a casing having stops to limit the movement of the cock, a handle for operating the cook, a locking handle mounted on said operating handle and provided with a lug for locking said cock against accidental movement, and means for preventing the application of pressure to said plug cock or valve tending to move the same from its seat.

2. A stop cock device comprising a plug cock or valve, a casing having stops to limit the movement of the cook, a handle for operating the cock, a locking handle mounted on said operating handle and provided with a lug for locking -said cock against accidental movement, and a cap section on said looking handle for covering said plug cock or valve to prevent access of dirt thereto and also adapted to prevent application of pressure tending to shift said plug cock from its seat.

3. A stop cock device comprising a plug cook or valve, a casing having stops to limit the movement of the cock, a handle for operating the cock, and a locking handle pivotally mounted on vand above said operating handle and having a lug adapted to engage a fixed stop to lock said cock against accidental movement, said locking handle being provided With a flange adapted to bear on said cock casing and prevent contact with said plug cock or Valve.

4. A stop cock device comprising a plug cock, a casing containing said cock and having a stop, an operating handle for said cock, a cap section mounted over the exposed SIDNEY GEORGE DOXVN.

Witnesses:

GEO. W. RIsTINE, J r., C. J. OLMSTEAD.

7 Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C." 

